Fig. 4From: OpenSense: An open-source toolbox for inertial-measurement-unit-based measurement of lower extremity kinematics over long durationsChanges in inverse kinematics (IK) orientation differences relate to changes in sensor fusion errors. Changes in IK orientation differences (mean over all joint angles per subject) from the 1st to 10th minute were strongly correlated with changes in sensor fusion error, indicating that IK orientation differences are a helpful tool for tracking error in the sensor fusion orientation when present. Individual subjects’ data are represented by black circles, and kinematics computed with both the complementary and the proprietary filter were usedBack to article page